JPS62232802A - Heat resistant self-bonding enamelled wire - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application 1] The present invention relates to a heat-resistant self-bonding enameled wire. Furthermore: iT shi<'>! Specifically, the present invention relates to a heat-resistant self-bonding enameled wire that can be used as a magnetic wire 7 for a deflection coil of a television or the like.

[Prior art 1. Deflection of television] - The mirror is located on the back of the cathode ray tube and plays a useful role in projecting the television screen.

Since the deflection yoke shield is attached to the back of the brush thin tube, it has a saddle-shaped shape, and since ordinary enamelled wire was used, it was difficult to form the deflection yoke shield.

For this reason, it is customary for deflection coils to be made by winding a self-bonding enameled wire around a saddle-shaped winding frame, and then forming the wire into a coil by heating with electricity.

Depending on the season, the deflection coke coil is used for TV reception from 40 to
The temperature reaches 90℃. If the deflection yoke is thermally deformed in this temperature range, the magnetic flux density distribution emitted to the cathode ray tube becomes uneven, resulting in color shift (
convergence change) is one of the causes. For this reason, there is a demand for a self-F!Aa Evmel wire with heat resistance (.0).

On the other hand, with the recent proliferation of office equipment such as personal computers and word processors, there has been a demand for higher definition display capacity.

There are various factors contributing to the high definition of display equipment, but one of the most important factors is the torsional deformation of the deflection yoke coil.

The main factors for the twisting deformation of the deflection yoke coil are the flexibility of the conductor of the self-bonding Evmel wire, the elongation during coil winding, and the bending current conditions.As a result of various studies conducted by the present inventor,
Surprisingly, it was found that the fusibility +A71 of the self-fusible enameled wire also acted as a factor in twisting deformation.

Now, conventional fusible materials are polyvinyl butyral resin,
Co-φ compound polyamide resin, epoxy resin, etc. are used. These polyvinyl butyral resins have poor heat deformation resistance, and copolyamide resins have excellent heat deformation resistance, but have a drawback in that they have large torsion deformability.

The disadvantage of JL boxy resin is that it has low contact strength and is also highly torsionally deformable.

[Problems to be Solved by the Invention] The present invention has been made based on such an idea, and its purpose is to eliminate the drawbacks of the prior art described above,
It is an object of the present invention to provide a heat-resistant self-bonding enameled wire that has excellent heat deformation resistance after coil forming and has low torsion deformability.

[Means for Solving the Problems 1] The gist of the present invention is that 100 m of polyhydroxypolynylene resin: +1 part, 5.-50 parts by weight of polyesterphone resin, 5 parts by weight of stabilized polyisocyanate resin.
= 50 parts by weight and 5 to 50 parts by weight of a thermoplastic polyurethane resin A heat-resistant self-bonding enameled wire characterized by being coated and baked on a conductor directly or through another insulator.

In the present invention, the polyhydroxypolyether resin includes phenoxy resins, specifically Ebonol OL 55 from Shell Chemyl, PK 1t-1, PKHΔ, and PK I-I C from Union Carbide.

Tobu Kasei YP-50J, YP-50, YP-500%
There are YP-40, Yl)-60, etc. The molecule ♀ of polyhydroxy polyether resin is not particularly limited, but:
The range in which the thermal contact temperature after coil winding can be kept relatively low is as follows:
27,000-40,000, especially 27,000-33
．． 000 is appropriate.

Polysulfone resin is in the molecular chain. -i-, -m-, -o- For example, IC1's 100P.

200P, 300'P, Union Carbide P-3
703, P-1700, P-3500, etc. Among these resins, those that can be thermally bonded at relatively low temperatures are P-
3703, r'-1700, P-3500, etc. In the present invention, the addition r1j of polysulfone resin is 5.
The reason why it is set at 501 Jt parts is because if the temperature is less than 5,000 rd parts, the heat deformation resistance after molding will be poor, and if it is more than 50 parts by weight, the thermal bonding strength will deteriorate rapidly.

Stabilized polyisocyanate is a polyvalent isocyanate made by chemically stabilizing isocyanate with a phenol compound, such as DAP from Nippon Polyurethane Co., Ltd.
5table, MS-50, etc. In the present invention a
3. The stabilizing polyisocyanate is blended at 5 to 50 parts by weight.If it is less than 5 parts by weight, the heat deformation resistance after molding will be poor, and if it is more than 50 parts by weight, it will not self-fuse. This is because the adhesion of the enameled wire decreases.

The thermoplastic polyurethane resin is a linear polymer polyurethane resin, and examples thereof include Barabrene 22S (thermal softening point: 105° C.) and Barabrene 26S (thermal softening point: 156° C.) manufactured by Hodogaya Chemical Co., Ltd. In J3 of the present invention, the blending amount of the thermoplastic polyurethane resin is 5 to 50 parts by F11 parts, because if it is less than 5 parts by 16 parts, there is no effect of preventing twisting deformation, whereas if it is more than 50 parts, the heat deformation resistance is high. It's for a reason.

[For fi] The effect of the present invention is to solve the problem of heat deformation resistance, which is a drawback of self-bonding enameled wire made of polyhydro 1-sulfone resin alone, by combining a specific amount of polysulfone resin and stabilizing isocyanate. In addition to improving the elasticity, the torsion deformation resistance, which is another difficult point, is effectively improved by blending a specific amount of thermoplastic polyurethane resin.

[Example] Next, examples of the heat-resistant self-bonding enameled wire of the present invention will be described together with comparative examples.

All of these self-bonding enamelled wires have a conductor diameter of 0.
47mm, heat-resistant section with a film thickness of 0.028mm (4 layers of self-melting paint made as shown in Table 1 on the upper layer of the poly-1 sderimide enamel wire with a film thickness of 0.009mm)
J: Sea urchin coated and baked.

The test method is as follows.

(1) Adhesion of self-fusing enamelled wire After being left at room temperature for 6 months, an adhesion test was conducted in accordance with J15-C-3003. It was shown in

(2) Heat-adhesive property of coil winding A 20-tangle helical coil with an inner diameter of 8111 m was prepared using a self-bonding "n" wire, heat-bonded at 170°C for 30 minutes, and then cooled to room temperature. The inter-turn peel strength of the cooled helical coil was measured, and the adhesive strength was 250 to 350.
, 150 to 250G is shown as Δ, and 50 to 150g is shown as ×.

(3) A model saddle-shaped deflection yoke coil 1 was created using a torsionally deformable self-bonding enameled wire, and the neck fringe portion 1-1 of the model deflection yoke coil was connected to a horizontal plate as shown in Fig. 1. 2 (low ridge part 1 when fixed so that it hangs)
Measure the misalignment distance with the horizontal plate 2 of -2, and the misalignment distance is 2 mm.
The following is indicated by O, 0.5 to 0.7+am is indicated by Δ, and 0.8 mm or more is indicated by ×.

From Table 1, the actual flow rate of the heat-resistant self-melting enameled wire of the present invention is that it has good adhesion and thermal adhesion, and also has good torsional deformation resistance and heat deformation resistance. On the other hand, the self-bonding enameled wire of the comparative example was evaluated as x in any of the characteristics.

[Effects of the Invention] The heat-resistant self-bonding enameled wire of the present invention has excellent torsional deformation resistance and heat deformation resistance after being molded into a wire, so it can be used for deflection screens of televisions. It is suitable for use as a net wire.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram showing a torsional deformation test method. Yu...moal deflection yoke'il. 1-1... Neck fringe part. 1-2...Question lo fringe section. 2...Water flat board. Agent Patent Attorney T Usuki 1) Riyuki -/S Company X- Ngo - −、ノ -v'-te

Claims (1)

[Claims] 1) 100 parts by weight of polyhydroxy polyether resin: 5 to 50 parts by weight of polysulfone resin, 5 to 50 parts by weight of stabilized polyisocyanate resin, 5 parts by weight of thermoplastic polyurethane resin
1. A heat-resistant self-bonding enameled wire, characterized in that it is formed by applying and baking a paint comprising 50 parts by weight directly or through another insulator onto a conductor.